Crossword Genius

Say a reverend bishop popped round to guzzle energy drink? (8)

Ross

I believe the answer is:

beverage

I'm a little stuck... Click here to teach me more about this clue!

'drink?' is the definition.
(I know that drink can be written as beverage)

'say a reverend bishop popped round to guzzle energy' is the wordplay.
I cannot really see how this works, but
'a' is present in the answer.
'bishop' could be 'b' (chess abbreviation) and 'b' is found in the answer.
'energy' could be 'erg' and 'erg' is present in the remaining letters.
The remaining letters 'eve' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for beverage that I've seen before include "Prepared drink" , "Non-alcoholic drink" , "Tea, say" , "Drink other than water" , "Liquid for drinking" .)

I've seen this clue in The Times.
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